Car-lighting system.



No. 886,445. I 1 PATENTED MAY 5, 1908.

W. A. TURBAYNE.

GAR LIGHTING SYSTEM.

APPLIOATION FILED JUNE 20, 1906.

the terminals of the dynamo.

, change'of speed of the exciter. Preferably,

terns in which a main dynamo is provided changes of voltage and by such variation of I battery circuit.

WILLIAM A. TlYRBAYNE, ,OF LANCASTER, NEW

YORK, ASSIGNOR To GOULD- COUPLE COMPANY, A CORPOVRATION OF NEW YORK.

CAR-LIGHTING SYSTEM. 7

Specification of Letters Patent.

Patented. May 5, 1908.

Application filed. June 20, 1906. Serial No. 322,515

To all whom it may concern:

Be it known that I, WILLIAM A. TURBAYNE, a citizen of the United States, and a resident of Lancaster, in the county of Erie, State of New York, have inventedcertain new and useful Improvements in (Jar-Lighting Systems, of which the following is a specification.

My invention relates to car lighting sysdriven in a suitable manner from the car, while a storage battery is connected across In these systems it is impossible to maintain a uniform voltage across the terminals of the dynamo or the terminals of the battery, because the d namo is subjected to very wide variations 0? speed and because the battery voltage must change in order that it may at times be charged. For this reason it is necessary to provide that the fluctuations of voltage of the system shall be eliminated or at least reduced substantially at the lamp terminals in the main circuit.

My invention consists in a car-lighting system employing, in combination with the usual dynamo and battery, a crusherplaced between the battery and the lamp circuit and regulated by a variable, speed apparatus whose speed varies in accordance with s eed )roducing greatccchangcs of voltage turn those occurring across. the dynamo or To this cnd I employ a mo tor connected across thcdynamo ircuit and designed so that its speed will vary in sub- I stantial accordancewlth the variation of the dynamo voltage and I mechanically connect to this motor both the crusher and an ex citer for the crusher, which exciter is so arranged that it gives an electro-motive-force which increascs in greater ratio than the I also drive the crusher by the same H10lul. By this arrangement I am enabled to inthe core of the magnet.

crease the opposing electro-motive-foree of the crusher to exactly the same extent as the voltage at ,lhc battery terminals increases, thus maintaining a constant voltage m the v main circuit in which the lamps are situated.

The drawiu accom )an im this s )ecifica lion indicates diagrammatically a car lighimg system cn'ibodying my in vcntion.

A the mam dynamo driven in any suiiable manner (not here shown).fro'1n llll car axle or other moving part of the car.

A represents'a field winding which may be regulated in any convenient manner to maintam as nearly uniform a voltage as can be -main tained, or as the necessity 'for charging 'the battery will permit. A very desirable method for regulating the dynamo has been set out in in patent No. 787,012, of April 11,

1905. As t is, however, forms no part of the.

resent invention, it is not illustrated in the rawing.

B is a storage battery in a branch circuit, whose terminals are connected to the terminals of the main generator.

0 C represent the main or lighting circuit in which are situated the lamps C of the car. In the main circuit C is the armatureD of the crusher. This crusher is driven by a motor whose armature E is connected in shunt between the oints 1 and 2 of the circuit. motor will? therefore, receive the variations of Volta e of the main generator.

F is tfie armature of an exciter for the field D of the crusher, this exciter armature and crusher field being connected in series. in a separate branch between the points'lfl and 2. The field magnet E" of the motor is wound -so as to be substantially saturated at all expected voltages. This is diagrammatically indicated in the drawing by the construction of On the other hand, thefield inagnet F of the'exciter is wound so as to at all times have a low density.

Gr represents the usual safety switch in the generator circuit between the points 1 and the battery unction with the main circuit, this switch being normallymaintained closed by the shunt coil g and the series coil This In operation when it is desired that t e main'ge'nerator shall be in service with the crusher outfit, a switch as It may be closed, thus connectm the motor and the exciter and the crusher field in their respectivecircuits.

When the voltage of the main dynamo has risen to a predetermined value, the coil g will close the switch G and the current from the generator will pass over the circuit and charge the batteriesas' well as provide current for the lamps if the are in circuit. at any time there should a reverse current from the batteries to the generator, this current passingthrou h the coil 'g neutralizes thepulling eflect o. the coil 9 and switch opens. soon as the voltage of the main generator rises sufficiently to charge the batteries in the branch circuit, therewill be too high a voltage for the efficient operation 'of the lamps in the main circuit so that an osing voltage is desired at the crusher he apparatus is so designed that with a voltage of dynamo A equal to that desired at the lamps the speed of the crusher outfit will because its field ma be such that the exciter F will produce a voltageexactly equal to that of the generator A. Upon an increase of voltage, however, the

motor E will correspondingly increase in speed, its field magnet strength being at all times the same, or substantially so, and, therefore, the exciter will correspondingly in- .equa to the increase of voltage on the main generator. Thus the voltage of the main circuit remains unchan ed.

' By my invention t e voltage can be varied in the branch circuit containing the battery B to any desired extent while automatically maintaining the desired volta e across the lamp circuit C. I find that this results in a thoroughly satisfactory car lighting system where the maintenance of a constant voltage on the main circuit is a most important advantage.

Having thus described my invention what I claim as new anddesire to secure by Let ters Patent is: o

1. In a car lighting system the combination of a variable speed dynamo generator, a main or lighting circuit and lamps connected therewith, a battery connected to the dynamo generator, a dynamo crusher in the main circuit between the lamps and the j unction of the battery and dynamo generator, a

motor connected'. across the circuit on the generator side of the crusher and arranged to be variable in speed in accordance with the vo'ltage variations of the dynamo generator,

and means for varying the voltage of the crusher in accordance with the varying speed.

of said motor.

2. In a car lighting system the combination of a variable speed dynamo generator, a

.main or lighting circuit and lamps connected therewith, a battery connected to the dynamo g enerator, -a dynamo crusher in the main circuit between the lamps and the junction of the battery and dynamo generator, a motor connected across the circuit on the generator sideof the crusher and arranged to be variable in speed in accordance with the volta e variations of the dynamo generator and a field regulating dynamo for the crusher mechanically connected to the said motor.

'3. In a car lighting system the combina tion of a variable speed dynamo generator, a main or lighting circuit andlam )s connected therewith, a battery connecte to the dynamo generator, a dynamo crusher in the main circuit between the lamps and the junction of-the battery and dynamo generator, a motor connected across the circuit on the generator side of the crusher and arranged to e variable in speed in accordance with the voltage variations of the dynamo generator,

and a field regulating dynamo for the crusher mechanically connected to the said motor, the armature of said field regulating dynamo being connected in series with the crusher field winding in a branch across the system.

4. In a car lighting system the combination of a variable speed dynamo generator, a main or lighting circuit and lamps connected therewith, a battery connected to the dynamo generator, a dynamo crusher in the main circuit between the lamps and the junction of the battery and dynamo generator, a motor connected across the circuit on the generator side of the crusher and arm able in speed in accordance with the volta e variations of the dynamo generator, a fie d regulating dynamo for the crusher having its armature connected in series with the crusher field winding in a branch across the system, and mechanical connections between the crusher, the motor and the field regulating dynamo. I

5. In a car lighting system the combination of a variable speed dynamo generator, a main or lighting circuit and lam s connected therewith, a battery connecte to the dy-' namo generator, a dynamo crusher in the main circuit between the amps and the junction of the battery and dynamo generator, a motor connected across the circuit on the generator side of the crusher and arranged to be variable in speed in accordance with the voltage variations of the dynamo generator, and having a substantially constant field strength,

and a field regulating dynamo mechanicall connected to said motor and in series wit the field winding of the crusher in a branch ed to be vari-' iio across the system, and having a low density field magnet. l 6. In an electrical system of distribution a source of electrical energy, a main or lightin circuit, a battery connected to the source, 0 electrical energy, a crusher in the main circuit between the load and the junction of the battery and source of electrical ener y, a shunt motor connected in parallel wit the load and crusher and arran ed to be variable in speed in accordance wit the voltagevariations of the source of electrical energy, and a field regulating shunt dynamo mechanically connected to said motor and in a circuit arallel with it, said circuit containing the eld winding "of the crusher in series'with said dynamogk I 7. In acar 'ligl'iting system, the combina: tion of a'variable speed main dynamo, a main lighting circuit and lam s connected therewith, a battery connecte( to the dynamo, a dynamo crusher in" the main circuit between 1 he lamps and the junction of the battery and main dynamo, a shunt motor connected across the circuit on the generator side of the crusher and arranged to be variable in speed in accordance withthe voltage variations of the main dynamo and a field regulating dynamo mechanically connected to said shunt motor and in series with the field winding of the crusher in a branch across the system, said field regulating dynamo bein so wound as to vary in voltage in excess of the variations in voltage of the main dynamo.

S. In a car lighting system the combination of a main generator, a main lighting circuit, a battery connected to the main generator, a dynamo crusher in the main circuit between the lamps and the junction of the battery and the main generator, a motor co'nnected across the circuit on the generator side of the crusher for operating the crusher and a field regulating'dynamo for the crusher adapted to vary in voltage in accordance with the voltage variations of the main gen-i eratorv In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAM A. TURBAYNE. Witnesses: EDMUND M. MAW, HENRY A. MONIN. 

